Cloth-cutting machine.



F. J. CLARK.

CLOTH CUTTING MACHINE.

APPLIOATION FILED AUG.31 l911.

Patented Jan. 28, 1913.

2 SHEETS*SHEET1 5% wzm j CLARK CLOTH GUI APPLICATION FILED Am T MACHINE.

Patented Jan. 28,1913.

2 SHEETS-SHEET 2 In 06/3 3 0/ if fifforne ys MACHINE Ta w ll 2 B known I v cutting '21 7mm H1 [1-1M V be of any Sa a 7 the county of F HP and no the pres- 5 Eew York, have invent N; $1M} [@3111181 in 6i:

Imymvemeni in lnflJ-f which the follewing Thia invantion rel 010th (milling Elm-111mm,; '1 have a traveling matter with a Grimm 11mm ma )ns object of .19, invent 2'1 machine 05' this; type of m paci ccusfrasctiox1 in w ich 15 ting knife s0 mmmwd on that it can be readily nijnswd {as mum" positisn's relative to tin 0f '31 and the mantriai mm 022% cutting ern 29 knife can bx V and bring Chiigi if w, 1' ting yusifion A further 0?); of lhi in PI'iYVidG driving PUGMII; fur ihc 2 "which will psi-21in .rafivc srn the knife in s"- without requiring; 22:15 thsreof. in the a side eigvai'ima 075K embodying flue grammafic View Q cutiing a fragmnmr y six f Na. on an enlzsrgiid pmfi 112:

casings and the knife r n the driving ggars. v showing the knife in m. M Fig, 5 a frag mntmr elev 02': cf t? 40 posie side of the machinem F :g. 6 is t ical cross section in line 6 6 *ig, 3 P1 v15 mount- 9 and 1s A an that V waved toward 3f the machine. amPz-z mm, it may thuf be *1 fini'wardlyxg Hr: pz'opar cutti a; plate and the suiiable means 1533. mounting @nmchine. In

nifa; carryin immwalls; 1 mrtiaiiy put witzvm WaHs-f plate ssts .3 f resting "d sm its inam with the when the knife miiienr On 51% pmvi-de with ilfi'ng arm G" ssimiiaiiy infmm Ar of construction wr 1 '31! mt the (Emanuel a is of fem:

7 is a fragmeniary sacfion in 3% 7 a its upper wall mad ihe 5. Fig. 8 is a crass scti0n in in I 8--%, Fig 5 rearwarly inclined arm 3 F5 9 is a horizontal cross Secfion 0f p mum he arm G whichiss secured 46 the kmfe and its nearing. #0 My imam A, by halts and farms the Like refezfence shame? 1.5 5% Ema-62' wall of the chanpart; 1511 tbasnwerzfi 3. i iand compact The 910th cut??? i118 -fiannal gmay be electrically dry 50 comgmses a szutab siandarfi B Wins 1;

base C having the usual 5 I The, @151 h 1 frama A by a. lower edge a? 1.21% rainy in i2 xsa'vais and ii i 1 miefi 0n the the usual thmai j at the frcmt and Q5: rear E; a slot 9 M this 1Q 4 7 A iiammmwi a ami Lhrmwh 5% as to pex- 119 mit of endwise movement of the arm G in the channel when the bolt is loosened.

Am-adjusting screw H, mounted in the frame A, engages the rear end of the arm G and enables a ready and nice adjustment to be made of the plate F on the standard. The lower wall of the channel 9 and the lower wall f of the standard upon which the knife carrying plate rests, are parallel with each other and are inclined at the same angle to the base as that along which it is desired to advance the axis of the rotary knife in adjusting this knife toward and from the base and throat plate. lVhen the cuttin edge of the knife becomes worn away 1n use, it becomes necessary to adjust the knife toward the throat plate to obtain proper cutting efficiency. To do this the bolt 9 is loosened sufficiently to permit endwise movement of the arm G in the channel,

9 and the adjusting screw H is then manipulated to move the carrying plate F downwardly and forwardly a suflicient distance to effect the necessary adjustment of the knife. After the adjustment is made, the bolt 9 is tightened to clamp the plate F securely to the frame in its adjusted position. In Fig. 2 is shown in a diagrammatic way the nature of this adjustment of the knife. The larger circle :1; represents the circumferential cutting edge of a knife of normal size when in position in the machine. The smaller circle .10 represents the circumferential cutting edge of this knife after the same has been worn away in use and the knife has been adjusted to take up this wear; This adjustment of the knife is forwardly and downwardly along the line 3 3/ which brings the cutting edge of the knife into close proximity to the throat plate. The are y y represents that portion of the cutting edge of the knife represented by the larger circle as, which engages the material to be cut, and it will be noticed that the smaller knife represented by the circle a" has a cutting are. which almost coincides I withv the are 3 y. The cutting edge of the smaller knife when adjusted, thus travels through the material in substantially the same are as that of the larger knife and its cutting efficiency is therefore not materiall y lessened by reason of its decreased diameter.

--I=n adjusting the knife, it is important that the driving connection between the drive shaft of the motor and the knife be such as not to become disengaged or disturbed by any changes in the position of the knife caused by the adjustment thereof. Any suitable driving connections may be employed for this purpose. In the construction shown, the following means are employed: The motor D is 'mounted on the frame A with the axis of its drive shaft (Z substantially parallel with the line of direction in which the knife is to be moved for adjustment. The shaft d is provided at its forward end with a spiral gear I which meshes with a second spiral gear I naled on the frame A with its axis parallel with that of the gear I. The knife E is mounted on one end of the hub k of a gear wheel K, being secured thereon by a nut is which has screw-threaded engagement with the end of the hub. Thegear K is journaled on the stub axle f of the knife carrying plate F and is connected by an intermediate gear L with the spiral gear I. The gear L is journaled on a stub axle Z projecting laterally from the side of the knife carrying plate and lies in the same plane with the gear K at one side of the knife. The gears K and L being both journaled on the knife carrying plate, move with this plate in its various adjustments, and" this movement causes the gear L to turn on the spiral gear I. The circumferential face of the "gear I is comparatively wide and is parallel with the direction of movement of the knife carrying plate and the teeth of the gear L will thus travel across the face of the gear I in the adjusting movement of the knife carrying plate without being thrown out of mesh therewith. The driving gears will thus remain in operative engagement with the knife in the different positions to which it can be adjusted. No change or adj ustment of these gears is necessary, the machine being ready for operation as soon as the adjustment of the knife is completed.

The knife being mounted 'on a carrying platewhich adjustable relative to and independent of the standard and motor of the machine, the necessary adjustments of the knife can be easily and quickly made without changing the position of the standard or its motor, and the adjustment of the knife in a direction at an angle to the base, enables the employment of a base of much less vertical thickness than is necessary in a machine in which the knife can only be adjusted in a vertical direction toward and from the base.

I claim as my invention:

1. In a cloth cutting machine, the combination of a base which is adapted to support the cloth during the cutting operation, and a rotary knife which is supported aboi e 'said base, said base having an opening to receive the lower edge of the knife, and

toward the front end of said openin to bring the cutting edge of said knife into close proximity therewith as the diameter of the knife decreases from wear, substantially as set forth.

2. In a cloth cutting machine, the combination of a movable base which is adapted to pass beneath the material to be cut and said knife being adjustable on its support" relative to said base in a forward direction eration and which is provided w 7 tudinal slot and a rotary knife which arranged above said base with its; lower." i-dgzn in said slot and is ndjustahly innnnnrd in: said base to move relative to said ham 2 forward direction at an inclination, to

base whereby the cutting edge (if the knit can be maintained in a Hl3-- stant relation tn the iyiztse 2i iiic 0f the knife decreases trim) RPM, mm; tially as set forth.

3. In a cloth cutting; nizwhi n-i the m bination with a rotary kni e and :i in:

ZOntal base having: rm opening in iweiw 1 ninth it;

to said base and supporting said knit and a driving motel for the kni'i e mounted it substantially tixnd nnsitinn 0n th Shi t ."k Said knife being adjustable tozwtu'tiiy w tive to said motor and said ha; I tion at an inclinatinn to said rim tially as set fmth' 5. In a cloth cutting inaehinm the Y nation with a rotary kiiiie and ,i ht; base having an upening to rennin, tin edge of the knife, 01 a standard t msaid base and supporting said kt in motor for the knife rmmntcd in an tia ly fixed position on the standar knife being adjustable tfm-mmii whit Said motor and said base in it d re an inclination to said base, and (iv nections between the nmtni' and the knife constructed to pee'mit said adjust knife, substantially as set t'mth.

a submit 6. In a cloth cutting mnchinu, the amt bination with a rotary knife and a. ii(, t'i7.mi-

'tal base hilViIl an unenin t0 revolve the i lower edge of the knife ot' a standard :3 cured to said base, :1 d1) Hug; motor, tn! knife mounted in substantially 1 tion on the standard, a carrier i Stlii izni tn adjust-able on said standard in mow knife relative to said inntur Wilt-l said and, diive connections betumn wi l 1 w 9nd said knife which renmin in M51 w n-L gut in: at. 1

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